Cooling System - Kubota EA330-E4 Series Workshop Manual

EA330-E4, WSM

(3) Cooling System

Fan Belt Tension
1. Check to see the belt tension allows a depression of the
specified amount when the belt is pressed down by a finger
midway between the cooling fan pulley (2) and tension pulley
(5).
2. Adjust the tension by the tension bolt (6).
Fan belt tension Factory specification
Size of fan belt
* The FM type refers to a low edge plain type, which is a van
rope for general fans having a upper canvas width of 11.0 mm
(0.433 in.) and a height of 8.0 mm (0.31 in.).
NOTE
• Whenever a new fan belt is installed, provide a tension
somewhat higher than specified, and adjust it as specified
after running the fan for some time.
(1) Fan Drive Pulley
(2) Fan Pulley
(3) Tension
Fan Belt Damage and Wear
1. Check the fan belt for wear.
2. Check if the fan belt is worn and sunk in the pulley groove.
3. Replace the fan belt if the belt is nearly worn out or deeply sunk
in the pulley groove.
(1) Defective Belt
Radiator Water Tightness
1. Fill the radiator with water to the specified amount and warm up
the engine.
2. Set a radiator tester and raise the water pressure to the
specified pressure.
3. Check the radiator for water leaks.
4. For water leak from the pin hole, repair with the radiator cement,
and for other leaks, replace the radiator.
CAUTION
• During operation or immediately after operation, coolant in
the radiator is extremely hot.
If the radiator cap is removed, hot water may gush out,
causing scalding. Open the radiator cap after the engine
has cooled.
Radiator water tightness Factory specification
1-S17
ENGINE
5.0 to 10 mm
0.20 to 0.39 in.
FM 32.5
(4) Force of 98 N (10 kgf, 22 lbf)
(5) Tension Pulley
(6) Tension Bolt
9Y1211018ENS0010US0
9Y1211018ENS0011US0
No leak at
190 kPa
2
1.9 kgf/cm
27 psi
9Y1211018ENS0012US0
KiSC issued 05, 2015 A